systemd時代のDockerをProxy環境下で使う

tl;dr

whywaita@client:~$ cat /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY=http://YOUR_PROXY_SERVER:8080/" "HTTPS_PROXY=http://YOUR_PROXY_SERVER:8080/"

前提

whywaita@client:~$ cat /etc/issue
Ubuntu 16.04 LTS \n \l

whywaita@client:~$ docker --version
Docker version 1.12.1, build 23cf638

本題

sysV時代には /etc/default/docker にプロキシ設定を記載していましたが、systemd時代になってそちらは読み込まれなくなったので、適切な位置に記載しましょうという話でした。

/etc/systemd/system/docker.service.d/http-proxy.conf を用意してー

whywaita@client:~$ cat /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY=http://YOUR_PROXY_SERVER:8080/" "HTTPS_PROXY=http://YOUR_PROXY_SERVER:8080/"

systemdに設定ファイルを読み込ませてー

whywaita@client:~$ sudo systemctl daemon-reload

ちゃんと読み込まれてるか確認してー

whywaita@kirihiko:~$ systemctl show --property=Environment docker
Environment=HTTP_PROXY=http://YOUR_PROXY_SERVER:8080/ HTTPS_PROXY=http://YOUR_PROXY_SERVER:8080/

dockerデーモンを再起動！

whywaita@client:~$ sudo systemctl restart docker

LGTM!!

whywaita@client:~$ docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world

c04b14da8d14: Pull complete
Digest: sha256:0256e8a36e2070f7bf2d0b0763dbabdd67798512411de4cdcf9431a1feb60fd9
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker Hub account:
 https://hub.docker.com

For more examples and ideas, visit:
 https://docs.docker.com/engine/userguide/

参考